<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>虚拟列表</title>
  <link href="index.css" rel="stylesheet">
</head>
<body>
<!--可视区域的容器  750px-->
<div class="viewport">
  <!--  容器内的占位，高度为总列表高度，用于形成滚动条-->
  <div class="list-phantom" id="content">
    <ul></ul>
  </div>
</div>

</body>
<script src="index.js"></script>
</html>